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1.51ct Cushion diamond
GIA Certified

1.51ct Cushion F SI2 Natural Diamond

- Cut · Excellent Pol/Sym · GIA Certified
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The essentials

Graded, line by line.

1.51
Carat
F
Colour
SI2
Clarity
-
Cut
Excellent
Polish
Excellent
Symmetry
Faint
Fluorescence
GIA
Lab
8.17 mm
Length
5.85 mm
Width
3.83 mm
Height
1.40
Ratio

Note: GIA does not assign a Cut grade for fancy-shape diamonds. Polish and Symmetry are the primary finishing indicators.

TABLE66%DEPTH65.4%CROWN HT—PAVIL DP—CULETMEASUREMENTS8.17 × 5.85 × 3.83 mm
Proportions

The anatomy of this stone.

A well-proportioned cushion displays maximum brilliance. Table and depth are the primary cut quality indicators for fancy shapes.

Table66%
Depth65.4%
Ratio1.40
Cut Tolerance
Excellent proportions

Both measurements sit in the top band — proportioned for maximum brilliance.

Total Depth65.4%Excellent
Good 57–74Very Good 58–70Excellent 60–66
Table66%Excellent
Good 55–72Very Good 57–69Excellent 60–67

GIA does not assign a cut grade for fancy-shape diamonds. Table and depth percentages are the primary cut quality indicators.

On the hand

See it, true to size.

Our live size visualiser lets you see this 1.51ct cushion at actual scale — photographed on a real hand, with carat and skin-tone controls so you can judge presence before you commit.

8.17 × 5.85 × 3.83 mm
Hand for diamond size comparison
Cushion
Skin Tone
15ct
1.51ct
0.2ct

Cushion·1.51ct·8.17 × 5.85 × 3.83 mm

Certificate

Verified, independently.

GIA
Independent certification
GIA Grading Report
Report no. 1565218699
About this diamond

This 1.51 carat naturally-formed cushion carries an F colour grade — near-colourless, exceptional quality. Graded SI2 clarity by GIA, it's a stone with character that goes well beyond the numbers — ready to be set into something made around it.

Available now

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The next step

Every Rêve diamond is set into a bespoke design.

Crafted to your specifications and ready in 2–2.5 weeks. Book a private appointment at our Mayfair showroom, or speak to a specialist online — we'll design something around this stone.

Grading Certificate · GIA
GIA
GIA®
GIA REPORT
Verify at GIA.edu
FACSIMILE
Digital representation of the original GIA Report. Security features not reproducible.
GIA NATURAL DIAMOND GRADING REPORT
November 02, 2026
GIA Report Number1565218699
Shape and Cutting StyleCushion
Measurements8.17 - 5.85 x 3.83 mm
Grading Results
Carat Weight1.51 carat
Color GradeF
Clarity GradeSI2
Cut Grade-
Additional Grading Information
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Inscription(s): GIA 1565218699
Proportions
Table: 66%
Depth: 65.4%
L/W Ratio: 1.40
Length: 8.17 mm
Width: 5.85 mm
Height: 3.83 mm
Clarity Characteristics
The clarity plot is on the original GIA report. Open the official report for the full diagram.
Grading Scales
GIA
COLOR
SCALE
COLORLESS
D
E
F
NEAR COLORLESS
G
H
I
J
FAINT
K
L
M
VERY LIGHT
N
O
P
Q
R
LIGHT
S
T
U
V
W
X
Y
Z
GIA
CLARITY
SCALE
FLAWLESS
FL
INTERNALLY FLAWLESS
IF
VERY VERY SLIGHTLY INCLUDED
VVS1
VVS2
VERY SLIGHTLY INCLUDED
VS1
VS2
SLIGHTLY INCLUDED
SI1
SI2
INCLUDED
I1
I2
I3
GIA
CUT
SCALE
EXCELLENT
VERY GOOD
GOOD
FAIR
POOR
GIA
Results refer only to this diamond based on data verified by GIA. Not a guarantee. Use "Open in new tab" for the original.
× 40 Zoom

Diamond Details

1.51ct Cushion Natural Diamond, F Colour, SI2 Clarity, - Cut
Total Price
£5,662Incl VAT
As low as £509 / month or interest-free.KlarnaClearpay
1.51
Carat
F
Colour
SI2
Clarity
-
Cut
Excellent
Polish
Excellent
Symmetry
8.17 mm
Length
5.85 mm
Width
3.83 mm
Height
66%
Table
65.4%
Depth
Faint
Fluoresc.
GIA
Lab
1.40
Ratio
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